Of steel synthetic digit deck replacement method

A can be reduced as much as possible the dimensions of the reinforcing member to be added for non-synthetic reduction in the steel synthetic digit slab replacement, and, no trouble to the crane installation work at the time of slab removal to provide a deck replacement method of steel synthetic digit. SOLUTION: In a steel girder G1 and Konkuto floor slab CS and the floor slab replacement method of steel synthetic digit to replace the existing Konkuto deck CS of steel synthetic digits together in precast deck CS ', the existing concrete floor slab before removing the CS, the reinforcing member L1 to reinforce in addition to non-synthetic of the reinforcing member mounting step of mounting the steel girder G1, the floor plate removal step of dismantling the existing concrete slab CS, slab after removal step, all or part of the joining member such as a bolt tightening the reinforcing member L1, and tightening relaxation step of or temporarily remove loosened, was carried out, after tightening once loosened or removed and said joining member again, the precast deck CS 'is placed on the steel girder G1. .FIELD 1